Athletes who follow heart rate-based training plans generally do the bulk of their workouts at lower intensities. That means ...

Whether it’s dancing along to a new pop song like Apple by Charli XCX or a classic Broadway musical like Chicago, the ...

When I was given the chance to see how well my heart and lungs work during a period of 'maximum exertion', I was a little ...

Your watch already tracks heart rate, but turning on this view helps you adjust your workouts in real time. Here's how to do it.